Use Mathematical Models
-If a rock falls from a height of 50 meters above the ground, the height $\mathrm { H }$ (in meters) after x seconds can be approximated using the formula $\mathrm { H } = 50 - 4.9 \mathrm { x } ^ { 2 }$. What is the height of the rock after 3 seconds?
A) $5.9 \mathrm {~m}$
B) $405.9 \mathrm {~m}$
C) $- 166.09 \mathrm {~m}$
D) $35.3 \mathrm {~m}$

Question

Quizplus · Accepted Answer

To find the height of the rock after 3 seconds, substitute $x = 3$ into the formula: $H = 50 - 4.9(3)^2 = 50 - 4.9(9) = 50 - 44.1 = 5.9$ meters.

Use Mathematical Models -If a Rock Falls from a Height H\mathrm { H }H

Use Mathematical Models
-If a Rock Falls from a Height $\mathrm { H }$